Finding the Fourth Proportional to 16,698.79, 23,044.25 and 9,145.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,698.79 : 23,044.25 = 9,145.10 : x
2. Step 2: Convert to fraction form
   16,698.79/23,044.25 = 9,145.10/x
3. Step 3: Cross multiply
   16,698.79x = 23,044.25 × 9,145.10
4. Step 4: Simplify right side
   16,698.79x = 210,741,855.45
5. Step 5: Solve for x
   x = 210,741,855.45/16,698.79
6. Step 6: Final answer
   x = 12,620.19